body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
}

.content {
    text-align: center;
}

.icon {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
}

/* 响应式设计：小屏幕适配 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .content {
        margin-top: 120px;
    }
}